Apple macOS up to 10.15.7 Kernel initialization

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4.7	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Apple macOS up to 10.15.7. This issue affects some unknown processing of the component Kernel. Executing a manipulation can lead to initialization. This vulnerability is registered as CVE-2020-27950. The attack needs to be launched locally. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.15.7 (Operating System). It has been declared as problematic. This vulnerability affects an unknown functionality of the component Kernel. The manipulation with an unknown input leads to a initialization vulnerability. The CWE definition for the vulnerability is CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. As an impact it is known to affect confidentiality. CVE summarizes:

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

The weakness was published 11/05/2020 with Google Project Zero as HT211947 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2020-27950. The exploitation appears to be easy. Local access is required to approach this attack. Technical details are unknown but a private exploit is available. The advisory points out:

A malicious application may be able to disclose kernel memory. Apple is aware of reports that an exploit for this issue exists in the wild.

It is declared as attacked. This issue was added on 11/03/2021 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 05/03/2022:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A memory initialization issue was addressed.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (592). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Operating System

Vendor

Apple

Name

macOS

Version

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Private
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

10/27/2020 🔍
11/05/2020 +9 days 🔍
11/05/2020 +0 days 🔍
11/06/2020 +1 days 🔍
01/29/2025 +1545 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211947
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2020-27950 (🔍)
GCVE (CVE): GCVE-0-2020-27950
GCVE (VulDB): GCVE-100-164410
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 11/06/2020 09:02
Updated: 01/29/2025 22:49
Changes: 11/06/2020 09:02 (18), 11/06/2020 09:06 (30), 12/03/2020 07:43 (1), 04/21/2024 07:35 (23), 06/30/2024 22:36 (2), 09/09/2024 22:29 (1), 01/29/2025 22:49 (29)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.